<!DOCTYPE html>
<html>

<head>
    <title>DaoHang</title>
    <meta charset="utf-8">
    <style type="text/css">
        * {
            margin: 0px;
            padding: 0px;
        }
        
        #dh {
            position: relative;
            margin-top: 0px;
            width: 100%;
            height: 40px;
            border: 0px;
            background-color: #0099CC;
        }
        
        #dh ul {
            padding: 0px;
        }
        
        a {
            width: 100px;
            height: 40px;
            display: block;
            text-decoration: none;
            text-align: center;
            line-height: 40px;
            font-family: Microsoft Yahei;
            font-weight: 2px;
        }
        
        #dh {
            margin: 0px auto;
        }
        
        #dh ul li {
            list-style: none;
            float: left;
        }
        
        #dh ul li a:hover {}
        
        #dh ul:hover {
            display: block;
        }
        
        #dh ul li ul {
            position: absolute;
            display: none;
        }
        
        #dh ul li ul li {
            float: none;
            background-color: #6688EE;
        }
        
        #dh ul li ul li a {
            font-size: 13px;
            font-weight: 0px;
        }
        
        #dh ul li:hover ul {
            /*二级菜单的触发点*/
            display: block;
        }
    </style>
</head>

<body>
    <div id="dh">
        <ul>
            <li><a href="#">综合排序</a>
                <ul>
                    <li><a href="#">规则1</a></li>
                    <li><a href="#">规则2</a></a>
                    </li>
                    <li><a href="#">规则3</a></li>
                </ul>
            </li>
            <li>
                <a href="#">销量最高</a></a>

            </li>
            <li><a href="#">距离最近</a>

            </li>
            <li><a href="#">筛选</a>

            </li>
        </ul>
    </div>
</body>

</html>